Yes, this is true. Giving medications purely to incapacitate a person is chemical restraint.
A Dr could prescribe something to help a patient sleep and encourage natural sleep, however any medications that cause a patient to be drowsy may not be prescribed to someone already having regular falls.
If the panic and agitation is a regular occurrence (not a result of the fall!) Then he may benefit from a medication for anxiety or to reduce agitation, whether as a regular medication or as a PRN (as needed)
This is something you can discuss with the care team and the GP.
If he's having recurrent UTIs aswell this needs to be resolved before medication intervention IMO, as the falls, agitation, etc can be commonly caused by UTI.
Check with the home as to whether he is on a fluid intake chart to monitor how much he drinks, and if not request one.
Ask them what fluid options they offer, such as water ball sweets, watermelon, pears, different drinks. And if there is anything he really likes to drink, liaise with the home to ensure he has this in regular supply.
Care staff can also remind him to take hourly fluids (fluid charts can help with this).
Is his room near the nurses station where he can be easily kept an eye on? If not, is a move to a new room possible?
Does he have a falls mat in place?
Would the home consider an ultralow profiling bed and a crash mat? This is something that we used to do as a last resort when we had exhausted all other options of keeping that person safe because although they'd still fall, it would make the fall safer.
On the same vein, you may wish to consider hip protectors, which are funny shorts that go under the clothes that contain 2 hip pads and a pad over the coccyx to reduce the risk of a fracture.
As a pp said, you can request that the home don't call you in the middle of the night unless it's an emergency, however this is still at the homes discretion and if they've had to phone an ambulance for a fall they may still consider this urgent enough to call.
Hope at least some of this helps OP, thinking of you.